Geochemical Anomaly Zones and Mineralization Concentrated Areas in China
Journal Title: International Journal of Engineering and Science Invention - Year 2018, Vol 7, Issue 5
Abstract
With the accumulation of detailed regional geochemical data, geochemical block concept is gradually revealling its limitations. On China 1:200000 stream sediment geochemical maps, we can find, gold, silver, copper, molybdenum, lead and zinc anomalies area, usually from a few km2 , to several tens of km2 , the maximum does not exceed a few hundred km2 . Accordingly it is difficult to delineate typical sense geochemical blocks. Large and small in all sizes geochemical anomalies are embedded in the generalized background field， this field form by average background with negative anomalies. they appeared the spread state of microscopic disorder macro regulation. For this reason, the author proposed the concept of geochemical anomalies dense bands, attempts to offset the defect of geochemical block concept. On China geochemical anomaly maps, according to the principle of within the region the maximum density anomaly and outside the region the minimum density anomaly, we can direct delineates anomalies dense bands. Gold, silver, copper, molybdenum, lead and zinc elements geochemical anomalies are basically unanimous, mainly distributed in the following areas: Great Hinggan, Little Hinggan, Hulunbuir, Qianshan-Zhangguangcailing, Inner Mongolia Plateau, Yinshan-Yanshan, Altai-Beishan, Ala mountains, Tianshan – Qilian - Qinling, Dabie mountain, Jiaodong peninsula, Taishan - Yimeng-Yuntaishan, Qinghai Nanshan, Kunlunshan–Bayanhar-Daxueshan, Kailash - Nyainqêntanglha, Xuefengshan, Nanling - Wuyishan, Yunnan-Guizhou plateau, Ailaoshan, Hainan island etc. There are great differences in this bands with previous geochemical province (block) delineation results. The zonal distribution area consistent with the plate suture zones, collison orogenic belts and volcanic island chains and other tectonic magmatic belts. Besides, consistent with the distribution of the main mineralization concentrated area. Distribution characteristics of geochemical anomalies and mineral deposit focus area, it reveals the close dependence relations between mineralization and crustal evolution, tectonization and crust-mantle mutual interaction.
Authors and Affiliations
Jin-zhong Gong
Keywords
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